President Obama, after meeting with the Danish prime minister Friday, told reporters that "all of us who have been seeing the terrible pictures coming out of Syria and Homs recently recognize it is absolutely imperative for the international community to rally and send a clear message to President Assad that it is time for a transition. It is time for that regime to move on and it is time to stop the killing of syrian citizens by their own government," according to a pool report.

The president said he was encouraged by the "international unity" that is developing and would continue to keep the pressure up and "look for every tool available to prevent the slaughter of innocents in Syria. "It is important that we not be bystanders during these extraordinary events," he said.

Earlier Friday, Secretary of State Hillary Clinton blasted Russia and China for their opposition to a UN Security Council resolution on Syria, calling their actions "despicable."